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Autism spectrum disorder (ASD) can be classified into two categories: "syndromic autism" and "non-syndromic autism". Syndromic autism refers to cases where ASD is one of the characteristics associated with a broader medical condition or syndrome, representing about 25% of ASD cases. The causes of syndromic autism are often known, and monogenic ...
There are many known environmental, genetic, and biological causes of autism. Research indicates that genetic factors are predominant in the appearance of autism; however, the heritability of autism is complex, and many of the genetic interactions involved are unknown. [ 1 ] In rare cases, autism has been associated with agents that cause birth ...
24.8 million (2015) [ 7 ] Classic autism, also known as childhood autism, autistic disorder, (early) infantile autism, infantile psychosis, Kanner's autism, Kanner's syndrome, or (formerly) just autism, is a neurodevelopmental condition first described by Leo Kanner in 1943. It is characterized by atypical and impaired development in social ...
A 2003 review of epidemiological studies of children found autism rates ranging from 0.03 to 4.84 per 1,000, with the ratio of autism to Asperger syndrome ranging from 1.5:1 to 16:1; [145] combining the geometric mean ratio of 5:1 with a conservative prevalence estimate for autism of 1.3 per 1,000 suggests indirectly that the prevalence of AS ...
A 2022 study in the “Children” journal concluded that the true female ratio could be 3 men to every 4 women, and that 80 percent of females remain undiagnosed with autism at the start of ...
The history of autism spans over a century; [ 1 ] autism has been subject to varying treatments, being pathologized or being viewed as a beneficial part of human neurodiversity. [ 2 ] The understanding of autism has been shaped by cultural, scientific, and societal factors, and its perception and treatment change over time as scientific ...